var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

//使用中间件(中间件就是一个函数)
//next 到达下一个中间件
app.use("/users",function(req,res,next){
    console.log("进入中间件11111");
    //放行
    next();
    console.log("返回中间件11111");
})
app.use(function(req,res,next){
  console.log("进入中间件22222");
  /* next();
  console.log("返回中间件2222"); */
  res.end("<script>alert('pls login');location.href='https:baidu.com'</script>")

})



app.use('/a', indexRouter);
app.use('/users', usersRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
